Means for releasing the fastenings of metallic parts in case of fire



Patented Mar. 9,1920.

E. H. McCLOUD. MEANS FOR RELEASING THE FASTENINGS 0F METALLIC PARTS lN-CASE 0F FI R E. APPLICATION F!LED1UNE2 9. 1.918. 1,332,946.

Emmwioz Y EdwardHM Claud/ 44 abbouwg 1 ing thesecuring devices. For example the channels for sliding fire shutters are fre-' UNIT-ED s TEs rnrnnronnion EDWARD H. McoL0Un,. or COLUMBUS, orrio, n'ssrenon re THE xI-nNnAn iranurne- TUBING COMPANY, or COLUMBUS, OHIO,' A CORPORATION on OHIO.

MEANS FOR nELEAsING THE, rnsrnmnss or METALLIC Princes IN onsn on Finn.

Specification of Letters Patent. Patented Mai, Q, 1920.v

- Application filed 311116.29, 1918. Serial No. 242,698.

To all whom it may concern: 1

Be it known that I, FiowAnnlrL MoCL Uo, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, haveinvented a certain new and useful Improvementyin Means for R0 leasing the Fastenings of Metallic Parts in Case of Fire, of which the following is a specification.

The object of this invention. is to provide improved means for securing a metallic member as for example a'metallic bar to another part so that when such metallic part is subjected. to a temperature adapted to 0th erwise buckle or. flex it such metallic part shall be per'mittedto expand notwithstandquently made up of two orbars bolted together. I

In putting up such channels great care was necessary to avoid turning up the nuts orbolts so'tightly as to prevent the desired more metallic slipping of the bars, and inmy practic-el" found that workmen could not be relied upon to leave the bolts sufliciently loose to *struction.

permit the proper expansion and maintain thestraightness of the bars when they were acted upon by undue heat; I have previously devised one means ofacconiplishing this. My present inventionaims to pro vide another form of means for permitting the bar or bars to expand whensubjected to such heat and is embodied in the oonstruc- I tion herein shown and described and then pointed out in the claims. J

In the accompanying drawings 7 Figure 1 is a view in front elevation of a fraction of a fire shutter channel. equippedwith the improvement. 1 i Fig. 2 is an edge View of the same looking toward the open side of the channel with parts in section to illustrate details of con- Fig. 3 is a horizontal section through the channel showing incidentally a modification. In the views the channel is shown as eoma spacer member 6 and a narrow bar 7. The

. three parts when bolted togetheras shown .form a'fgroove 8 in which one edge of the fire V employed, however, it is desirable that the shutter travels when raised and loweredias lhe bars .and spacer member are usually cured fixedly together at their upper ends to the wall nieans'of a bolt at 9 passed through alined round holes in the channel members of the same diameter at the shank of the bolt so that when the bars are subjected to undue heat they expand downward circumstances. At one or more points below longitudinally in" the channehmembers 5, (3 and 7 respectlvely and into the nut 11 ot'an expanded shell 12- set in a hole intho wall.

and perhaps at different rates according to But betweenthe head of the bolt 10 and the outer channel member 7 two wedge shaped blocks 13 and 14 are placed upon each other a so that their opposite faces are substantially n parallel with the, plane of the junction be---' tween them inclining upward toward the.

channel; The block '13 next the channel member 7 is provided with lugs 18 and 13 (seefull lines Fig. 2 and broken lines Fig.

1) engaging the channel at the upper and lower ends of the slotofsaid channel member. When the blocks have been placed. in the position descr bed the bolt is turned up sufiiciently tight to hold the'cliannel mom.- bers'intheir proper positionf It will be observed, therefore, that when the channel is subjected to undue heat, as forexamp le eta nearby fire, suflic1ent to cause much expansion of its members the inner. wedgeblock 13 is carried down, separating it from the 4 block 14 and leaving all the channel members free to expand longitudinally andindependently of each other. This freedom for expansion prevents the budding of. the channel and the formation of spaces for the passage of fire as well as otherpossible undesirable consequences.

Instead of a bolt of the kind shown in Fig. 2 there can be employed a bolt 15 such as shown in Fig. 3 which has a non-rounded head 15' at its inner end where it engages a-similar countersink in the inner channel member 5 the threaded shank 15 of said boltbeing exposed through the outer chan- "nel member 7 to receive a binding nut 16.

Where this last describedconstruction is channel members be secured-t0 the wallet 

